Process of finish stamping metallic articles such as spoons, forks, and the like



Sept. 8, 1925; 1,552,747 A. KLUMPP PROCESS OF FINISH STAMPING METALLICARTICLES SUCH AS SPOONS, FORKS, AND THE LIKE Filed March 21, 1924 2Sheets-Sheet 1 Sept. 8, 1925. 1,552,747

PRO

A. KLUMPP 0355 OF FINISH STAMPING METALLIC ARTICLES SUCH AS SPOONS,FORKS, AND THE LIKE Filed latch 21. 2 2 Sheets-Shag 8 Patented Sept. 8,1925.

ADOL-F KYLUMBP, or DESECNZANo An snare, many.

PROCESS .OFFINISH Selma-PineMETALLio-AR iiIoLEs .suoH As spoons, Forms;AND

THE LIKE;

A nmar e-me iemhmil a semi 5 9- was.

70 e l' jmimrea wern-z i Be it known that I, .Anonr Knulurr; a citizenof theiRepublic of Germany, residing atVia Pala zzi 7, Desenzano'alfserio, Italy, 5 hate invented. certain" new and useiul In;-

. increments in a Process of Finish Stamping l e a iemti 1ss uch s. po nFee -se theme; of

p royided withan-y {other metal coating, and

inpreoIi- 'er it is'iinpossible to distribute this coating. bystampingsuch a manner, that thesaid coating will be thicker at the places 5which: are subjected tofa'greater wear than t e her laee tt e sevens, fok a t e i Further her e ithee. n t bee 1-- n a t d ii ess a heemme pe an me Pa of tl1 pe -r-the h h rd r than other, placest hereoii. w

The awbac s ebe e melt? m1, r 61, some y h mrinsfrrs accor ng t thepresent invention, i'h ich-is carried out infclo sedwdicsj. i g V 1 '7Taking a spoon by way of example,

he i ntieh m y in Pra t e b ca ed o t as, hereinafter described withreference tov the accompanying drawings wherein v 7 s- 1 il us a e nclsct o as and;

bottom-die blankin the shape of a spoon. a i

Fig. 2 is a plan View of the bottom-die. Figs. 3 and 4 illustrateinsection dies for providing. an article With a tin or other metalcoating.

In Figs. 1 and 2, A designates the bottomdie and B the top-die, the diesfitting into i one another in such a manner that the material of thespoon to be subjected to a finish stamping cannot pass out at any placebetween the two dies and with such dies if the necessary pressure isapplied it is possible allowi is .a spe cifi- ,"a e pr vid desired! tohave certain places ofthe finished 7 $199 .11: f ar cul r ness t ength,sple n lank will e mad?- somewhat h er h e r m De i e th stamp 2g: Ire-t s he P s u fw l b omespondingly harder at these places and therefore the metal will be more compressed at the latterasithe same cannotescapelateral ly,

so, this partof the spoon will be harder and stnoi iger' than the otherparts thereot; The same e ect mayb ebt ne key-mak n the raised part olithef die slightly higher. Alw i i at cas h ir eem l h hea s? or stronger,at that place and consequentlythe .n etal; will be n erecompressed a dthere.-

fo the stamping is harder at thatfplace than at the other places. -=Nhen placing blank into h bottom-diewh ch r170- yided with recesses mandpr sing tgheatopdie B, which is fu nished with proj ect n sm:amlaptecl to pass into the recessesmt' of the bottom-die (and to beguided by them, onto sides against walls the diesi correspendingpressureisapplied and therefore a smooth andglossy asthe dies; An apptewciableburr cannot be formed itall; sides-of the? die Bf fit properlyinto, the die ll;

the. C is thicker between at the ordinary blanlga the pressure wi l; bestran e e 'that pla e and: as he a ne e ap there- 5 1i l h v mor so andtherefore isharder v nd strongen V t. he .1 9. 11? m th ik wl r 'on ist.ofiron or;- any other. hard metal and erect a -crossesectional areaL(Fig.3). 0- L" :(Fig. e o ith a mat ng f; a oi -te meta ashes f rexample imed: pressed: between dies D, D or E, E respectively; the

- softer coating-metal will be pressed into the form enclosed by the topand bottom-dies.

The metal-coating canbe made heavier or thicker at the bearing surfacesZ of the spoon or at its edges or corners S or at all places which aresubjected to the greatest wear, in that the free space between the'topand bottom-dies is correspondingly larger at those places. Hithertofor instance the coating of tin on iron could not be made thick enough,as it wouldha-ve been too rough.

'According to'the invention this is possible without any diificulty asin the completely closed dies all parts of a rough coating of insertedblank, the latter; will rest at all 7 any desired thickness will bestamped quite smoothly. Thus by the process according to the presentinvention not only far nicer but more durable spoons, forks and the likeare produced than by the known processes.

It is to be remarked that the essential feature of that part of theinvention relating to the smooth stamping consists in that spoons, forksand the like, which have already been provided with the final shape, aresubjected to a last or final operation, in which by means of stamping indies, closed at all sides, such a smoothness is attained that thehitherto necessary, expensive and troublesome subsequent filing andgrinding opera tions are not necessary.

Iclaim:

1. A process of finish stamping metallic articles, such as spoons, forksand the like which consists in subjecting the blank to a single stampingoperation in a pair of dies the two dies tightly fitting into oneanother, so that the material of the article is fully enclosed at allsides and cannot escape at any side during the stamping operation tocause all sides of the article to be provided with a smooth finishwithout the possibility of the formation of any burr, so that anysubsequent filing or grinding of the stamped article can be dispensedwith.

2. A process offinish stamping metallic articles, such as spoons, forksand the like which consists in forming the blank somewhat thicker at aplace at which it is desired that the finished article shall beparticularly strong subjecting the blank to a single stamping operationin a pair of dies the two dies tightly fitting into one another, so thatduring the stamping operation the blank is fully enclosed at all sidesand will be more compressed at the said place than at the other placesand cause all sides of the article to be provided with a smooth finishWithout the possibility of the formation of any burr, so that anysubsequent filing or grinding of the stamped article can be dispensedwith.

3. A process of finish stamping metallic articles, such as spoons, forksand the like which consists in subjecting the blank to a single stampingoperation in a pair of dies the two dies tightly fitting into oneanother and at a place at which it is desired that the finished articleshall be particularly strong one of the said dies is slightly higher, sothat during the stamping operation the blank is fully enclosed at allsides and will be more compressed at the said place than at the otherplaces and cause all sides of the article to be provided with a smoothfinish without the possibility of the formation of any burr, so that anysubsequent filing or grinding of the stamped article can be dispensedwith.

1-. A process of finish stamping metallic articles, such as spoons,forks and the like which consists in subjecting the blank provided witha softer metallic coating to a stamping operation in a pair of dies, the

two diestightly' fitting into one another so that during the stampingoperation the coating metal is distributed over the entire surface ofthe article and cannot escape at any side to cause all sides of thearticle to be pro vided with a. smooth finish without the possibility ofthe formation of any burr, so that any subsequent filing or grinding canbe dispensed with.

5. A. process of finish stamping metallic articles, such as spoons,forks and the like which consists in subjecting the blank pro- 'videdwith a softer metallic coating to a stamping operation in a pair ofdies, the two dies tightly fitting into one another and at the place atwhich in use the finished article is subjected to a greater wear thefree space between the dies is larger than at the other places, so thatduring the stamp ing operation the coating metal is distributed over theentire surface of the article but will be thicker at the place disposedbetween the enlarged free space of the dies and the said coating metalcannot escape at any side of the dies during the said stampingoperation, whereby all sides of the article are provided with a. smoothfinish without the possibility of the formation of any burr, so that anysubsequent filing or grinding can be dispensed with.

In testimony whereof I aifix my signature.

ADOLF KLUMPP.

